Note 11 - Shareholders' Equity (Detail) - Stock option awards (USD $)	12 Months Ended
	Jul. 28, 2012	Jul. 30, 2011	Jul. 31, 2010
Granted and outstanding, beginning of year	137,151	205,055	178,905
Granted and outstanding, beginning of year (in Dollars per share)	$ 38.06	$ 36.00	$ 40.50
Granted	52,000		33,200
Granted (in Dollars per share)	$ 9.98		$ 7.75
Cancelled and forfeited	(5,143)	(67,904)	(7,050)
Cancelled and forfeited (in Dollars per share)	$ 78.27	$ 31.88	$ 17.25
Outstanding at end of year	184,008	137,151	205,055
Outstanding at end of year (in Dollars per share)	$ 29.00	$ 38.06	$ 36.00
Exercisable at end of year	124,108	117,721	169,965
Exercisable at end of year (in Dollars per share)	$ 38.33	$ 42.96	$ 41.00